Electrode framework beam structure water-cooled furnace cover of direct current submerged arc furnace

Abstract

The utility model relates to the technical field of submerged arc furnaces, in particular to a direct current submerged arc furnace electrode framework beam structure water-cooling furnace cover. The furnace cover comprises a furnace cover body and furnace cover stand columns for supporting the furnace cover body. The furnace cover is composed of a central cover plate on the inner side of the electrode and a water-cooling upper cover plate around the central cover plate, and two flue gas leading-out flues are arranged on the two sides of the furnace cover; a box type water cooling beam is arranged between a furnace cover and a furnace cover stand column, a water cooling upper cover plate and a center cover plate are laid at the upper end of the box type water cooling beam, and a sealing aluminum silicate rock wool product is tightly pressed between the cover plate and the box type water cooling beam through self weight. The upper plane of the furnace cover adopts a water-cooling box girder structural form, so that the furnace cover has very high bending strength structurally. The modularized water-cooling coaming, the water-cooling upper cover plate and the central cover plate are adopted, replacement is simpler and more convenient, maintenance and spare parts can be more specific, and large-area disassembly and replacement are not needed. The sealing mode is achieved through heating expansion of parts, and the sealing effect is better when the parts expand.

Description

Technical Field

[0001] This utility model relates to the field of electric arc furnace technology, specifically a water-cooled furnace cover with an electrode skeleton beam structure for a DC electric arc furnace. Background Technology

[0002] In existing technologies, the application of DC submerged arc furnaces in the metallurgical industry is becoming increasingly widespread. Their advantages include good arc stability, concentrated power, high thermal efficiency, low power consumption, low electrode consumption, low operating noise, and high production efficiency. The water-cooled furnace cover structure is as follows:

[0003] The traditional AC furnace structure is a cylindrical structure with a frame beam and water-cooled fan blades. The entire top cover is flanged and rests on the frame beam. Its disadvantages are: 1. The entire top cover lacks frame beam support, relying on suspension to ensure its strength; 2. Suspension occupies a large maintenance space, making maintenance of other adjacent components difficult, increasing labor intensity and maintenance time. This application addresses the problem of dead material zones arising from the traditional circular structure of the furnace shell and cover in DC electrode furnaces with varying electrode wall distances. Utility Model Content

[0004] The purpose of this utility model is to provide a water-cooled furnace cover with an electrode skeleton beam structure for DC submerged arc furnace that is structurally robust, easy to maintain, and modularly manufactured, in order to address the above-mentioned shortcomings.

[0005] The technical solution of this utility model is: a water-cooled furnace cover with an electrode skeleton beam structure for a DC submerged arc furnace, including a furnace cover and furnace cover columns supporting the furnace cover. The furnace cover consists of a central cover plate inside the electrode and a water-cooled upper cover plate around the central cover plate. Two flue gas outlet ducts are provided on both sides of the furnace cover. A box-shaped water-cooled beam is set between the furnace cover and the furnace cover columns. The water-cooled upper cover plate and the central cover plate are laid on the upper end of the box-shaped water-cooled beam, and the sealing aluminum silicate rock wool products are pressed between the cover plate and the box-shaped water-cooled beam by their own weight.

[0006] The above plan also includes:

[0007] The box-type water-cooled beam consists of four electrode hole reinforcing ring beams, an outer ring reinforcing beam, and longitudinal and transverse connecting reinforcing beams between them.

[0008] The outer ring reinforcing beam has a flue gas outlet.

[0009] The furnace cover column has an internal water-permeable structure.

[0010] The advantages of this utility model are: 1. The upper surface of the furnace cover adopts a water-cooled box beam structure, which has very high bending strength. 2. The modular water-cooled enclosure plate, water-cooled upper cover plate, and central cover plate make replacement simpler and more convenient, and maintenance and spare parts can be more specific without large-scale disassembly and replacement. 3. The sealing method utilizes the thermal expansion of the components; the more the components expand, the better the sealing effect.

[0011] The embodiments of this utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0012] Figure 1 This is a simplified structural diagram of the present invention.

[0013] Figure 2 yes Figure 1 Top view of the simplified structure.

[0014] Figure 3 This is a simplified diagram of a box-type water-cooled beam structure.

[0015] Figure 4 yes Figure 3 Simplified structural diagram viewed from below.

[0016] Figure 5 This is a simplified cross-sectional diagram of a box-type water-cooled beam.

[0017] Figure 6 This is a simplified structural diagram of the water-cooled top cover, center cover, and box-type water-cooled beam sealing configuration.

[0018] Figure 1-6 The component names are as follows: 1. Water-cooled upper cover plate, 2. Box-type water-cooled beam, 3. Center cover plate, 4. Hanging device, 5. Water-cooled column, 6. Water-cooled upper cover plate, 7. Flue gas outlet duct, 8. Electrode hole rib ring beam, 9. Outer ring rib beam, 10. Longitudinal and transverse connecting rib beam, 11. Flue gas outlet duct opening, 12. Water passage cavity, 13. Cover plate and box-type water-cooled beam section seal, 14. Cover plate and box-type water-cooled beam lower seal. Detailed Implementation

[0019] See Figure 1-6 A semi-enclosed water-cooled furnace cover with an electrode skeleton beam structure for a DC submerged arc furnace is disclosed. It employs a fully water-cooled structure (water jacket, inlet and outlet ports, etc.) and is lined with castable refractory. The main components include water-cooled columns 5, a central cover plate 3, water-cooled surrounding plates 6, box-type water-cooled beams 2, a water-cooled upper cover plate 1, a hanging rod device 4, and electrode sealing and guiding devices. It also includes an operating furnace door, observation door, explosion-proof device, pressure measuring device, and temperature measuring device. The cover plate is equipped with pressure measuring and temperature measuring devices. Reliable insulation is provided between the overall furnace cover and the furnace shell, between the electrodes, between the feed pipes, and between the flue, ensuring safe and reliable operation of the electric furnace.

[0020] The furnace cover consists of a central cover plate 3 inside the electrodes and a water-cooled upper cover plate 1 surrounding the central cover plate 3. The overall water-cooled frame of the furnace cover forms the main structure. The furnace cover is divided into multiple independent functional modules, including the central cover plate 3 and the water-cooled upper cover plate 1, adopting a modular labyrinthine water-cooled structure. Each module is easy to inspect, disassemble, and install. Two flue gas outlet ducts 7 are provided on both sides of the furnace cover. The furnace cover columns are water-cooled columns 5, made of seamless steel pipes with an internal water-cooled structure as the main support columns. In terms of the structural strength of the furnace cover, an internal support frame is designed, using a water-cooled box beam structure. It is composed of box-shaped water-cooled beams 2 spliced ​​together to form an overall main frame, ensuring that the frame is tightly integrated with the furnace cover body, greatly improving the overall structural strength, making it sufficient to withstand the complex thermal and mechanical stresses inside the furnace. The box-shaped water-cooled beams 2 consist of four electrode hole rib ring beams 8, outer ring rib beams 9, and longitudinal and transverse connecting rib beams 10 between them. The box-type water-cooled beam 2 consists of four electrode hole rib ring beams 8, outer ring rib beams 9, and longitudinal and transverse connecting rib beams 10. The cross-sectional structure of the box-type water-cooled beam 2 is a U-shaped channel made of bent steel plate, divided into two chambers by a central rib. The steel plate seals the top, ultimately forming two water-cooled water passage chambers 12. Water plates of the water-cooled upper cover plate 1 and the central cover plate 3 are laid on the upper end of the box-type beam structure. Their own weight presses the sealing aluminum silicate rock wool products between the cover plate and the box-type water-cooled beam 2. As the smelting temperature increases, the components expand, and the sealing effect gradually increases. The furnace cover plate 6, the water-cooled upper cover plate 1, and the central cover plate 3 adopt a modular labyrinth-style water-cooling structure. The water-cooled cover plate 6 and the water-cooled column 5 are connected by bolts using a flange lamination method. Aluminum silicate rock wool products are used to fill and seal the gaps between the flanges. Through the connection and sealing of each component, the entire furnace cover becomes a sealed whole. The hanging device 4 acts directly on the structural beam on the upper plane of the furnace cover, further strengthening the furnace cover.

[0021] In terms of sealing design, a labyrinth sealing structure is introduced, along with high-temperature and corrosion-resistant sealing materials, to effectively prevent the leakage of high-temperature gases and dust inside the furnace, improve energy utilization, and ensure a safe and clean production environment.

[0022] An easily accessible maintenance window is provided on the side plate of the furnace cover, which allows operators to quickly inspect and maintain key parts without shutting down the furnace, greatly shortening maintenance time and improving production efficiency.

[0023] The furnace cover of a DC electric furnace can effectively improve the smelting efficiency of the DC electric furnace, reduce production costs, and create higher economic benefits for enterprises.

[0024] The above description is merely a specific embodiment of this utility model, and the various examples do not constitute a limitation on the substantive content of this utility model.

Claims

1. A water-cooled roof for a direct current (DC) smelting furnace electrode skeletal beam structure, comprising a roof, a roof leg supporting the roof, characterized in that The furnace cover is composed of a center cover plate (3) inside the electrode and a water-cooled upper cover plate (1) around the center cover plate (3), two flue gas leading flues (7) are arranged on both sides of the furnace cover, a box-shaped water-cooled beam (2) is arranged between the furnace cover and the furnace cover column, the water-cooled upper cover plate (1) and the center cover plate (3) are laid on the upper end of the box-shaped water-cooled beam (2), and the sealing silicate rock wool product is pressed tightly between the cover plate and the box-shaped water-cooled beam (2) by the dead weight.

2. A water cooled roof for a DC smelting furnace electrode skeletal beam structure according to claim 1, characterised in that The box-shaped water-cooled beam (2) is composed of four electrode hole rib ring beams (8), outer ring rib beams (9) and longitudinal and transverse connecting rib beams (10) therebetween.

3. A water cooled roof for a DC smelting furnace electrode skeletal beam structure according to claim 2, characterised in that The outer ring rib beam (9) is provided with flue gas leading flue openings (11).

4. A water cooled roof for a direct current electrode support beam structure for a submerged arc furnace as claimed in claim 1 or 2, characterised in that The furnace cover column is a water-cooled column (5) with a water passing structure.

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